Is this Vue? I like your terrain and your dynamic population is pretty good. Constructively I would like to say that to make it look more realistic you should add a Terrain Fractal to the Color Tab of your Ecosystem. That was you can get varying colors in your Trees and it makes it seem more real. Also it may be good to play with your anti aliasing in relation to your sun/atmosphere settings to have your shadows really draw out the shapes of the trees. Just a couple ideas that may help :)

thanks, problem with my ecosystems is that usually it will just cover the whole terrain and in this one i kind of had to. vue has wierd lighting for different things and the terrain looked very bad with no trees on it :/ so i kind of had to cover up the whole thing.
the thing with AA is that i turned it down a lot because the render was going onto 10+ hours while this rendered in about 1